Improvement in metal-planers



JAMES HEEVEY STEENBERGH,

UNITED STATES PATENT OFFICE."

O-F READING, PENNSYLVANIA.

IMPROVEM ENT IN M ETAL-PLANERS.

Specification forming part of Letters Patent No. 70.479, dated November 5, 1867.

Bc it known that I, J nuns HERVEY STERN- BERGH, of the city of Reading, county of Berks, and State of Pennsylvania, have invented a new'and useful Improvement in Metal-Planers, (or face-grinding machines 5) and that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of this specification, in which- Figure 1 represents a side elevation. Fig. 2 represents a front elevation. Fig. 3 represents a top plan of the frame, with the grinding-wheel and tables removed to show the beveled wheels upon which the bottom table -IHOVGS.

Similar letters of reference, where they occur in the separate tigures denote like parts of the machine in each of the drawings. p

The machine is intended for planing or grinding olf metal surfaces with rapidity and with great accuracy, and more particularly for planing off smoothly and perfectly true any hardened surfaces which cannot be cut with a steel tool on the ordinary planer now in common use-such, for instance, as chilled iron, hardened steel, anvil-faces, plane-irons, sawblades, glass or stone surfaces, or other hard substances.

Referring to the accompanying drawings, Figs. l and 2, F F is a heavy cast-iron frame, upon which are erected perpendicnlarly the uprights U U, with a cross-piece, P, holding-V the hand-wheel H W, if desired.

them firmly together at the top.

T T is a table, moving backward and forward under the wheel E W, carrying the sliderest S R, which moves at right angles to the motion of the table T T and across the face of the wheel E W, upon. which slide-rest is secured the vise V V, or other suitable arrangement for holding the article to be ground.

The table T T is provided with V-shaped grooves at G, Fig. 2, intended to rest upon and move backward and forward over the beveled wheels b fw. (Represented in Fig. 3.) The object of these beveled wheels running in the grooves G G, Fig. 2, is to prevent the wear unavoidable in case the table T T were to slide'backward and forward over oiled surfaces, upon which the dust from the wheel E W would lodge and cut away the bearing-sur- 31065.

The wheels b w, Fig. 3, should be made uniform in size, all having the same bevel to t the grooves G G, Fig. 2, and entirely concealed from the ,emery-wheel dust in the boxesrunu Upon the shaft S is a pinion, a a, Fig. 3, y

which engages with the rack R, Fig. l, intended to move the table T T backward and forward under the wheel E W.

' At m, Fig. l, is a screw working through .a nut fastened to the under side of the slide-rest S R, by which the slide-rest carrying the article to be ground is moved across the table T T; also, at K, Fig. l, is a screw by which the vise V V is worked.

E W is a solid vulcanite emery-wheel or other grinding wheel or stone, supported on the shaft S S, Fig. 2, which shaft I prefer t0` make of steel, having bearings at A A, and adjustable at various heights to suit the work by means of the screw C, which raises and lowers the cross-head O H upon the uprights U U.

B B are belts, which drive the pulleys p p, Fig. 2, which are fastened to the shaft S S.

The ordinary feed-motion now in common use on iron-planers can be attached to the shaft S, Fig. 2, by which the table T T and sliderest S R can be moved by power instead of by The wheel E Wrevolves in the direction of the arrow, throwing the dust back of the machine'and away from the workman. It can be run, however, in either direction.

Now, when the-article to be planed off or ground is securely held in the vise V V, (or other suitable arrangement for holding the work,) and the grinding-wheel E W adjusted at the height required by turning the handwheel D, and set in motion, then, by means of the hand-wheel H W, (or by means of a feed-n1otion,) the table TT, carrying the sliderest S R and vise V V, is moved backward and forward under the wheel E W, and the slide-rest S R, holding the vise and work, is

moved gradually across the face of the wheel E WV until the surface ofthe article is ground suiiiciently. By this arrangement the wheel E W will always keep itself in a true circle, and the high points of the article in the vise will be touched first and ground down level.

In practice this machine works admirably in grinding chilled iron, valve-faces of chilled iron for` engines, dies for nut, nail, and other machines, anvil-faces, without ai'ecting the temper of the steel, the edges and surfaces of rough castings, and any other hardened surfaces. If an emery-Wheel is used, it should be run fast enough to give a speed of five thoui sand feet per minute on its face, in order to develop its rapid-cutting qualities.

I clailn as my invention- The combination as Well as the arrangement of the emery-wheel E NV, (or other grinding` or polishing wheel or stone,) adjustable at various heights to suit the work by means of the screw C, in connection with a movable table, T T, carrying the slide-rest S It and vise VV, (or other suitable arrangement for holding the article to be planed or ground om) for the purposes mentioned, substantiallyT as set forth and described.

J. H. STERNBERGH. Witnesses:

JACOB SNELL, THOMAS DARLINGTON, J r. 

